Device for operating elevator-doors



I (No Mode l.) 2 Sheets-Sheet 1.

W. E. NIOKERSON. DEVICE FOR OPERATING ELEVATOR DOORS.

NO. 408,509. x Patented Au 6, 1889.

Q N E.

4 1 A Wm- 41:55:55 I X INVEN'TUR MZ J- y/lwaww UNITED STATES ATENT OFFICE,

WILLIAM E. NIOKERSON, OF CAMBRIDGE, MASSACHUSETTS.

DEVICE FOR OPERATING ELEVATOR-DOORS.

SPECIFICATION forming part of Letters Patent No. 408,509, dated August 6, 1889.

Application filed May 1, 1389. Serial No. 309,182. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM E. NICKER- SON, of Cambridge, in the county of MiddleseX and State of Massachusetts, have invented certain new and useful Improvements in De vices for Jointly Operating the Doors of the Elevator Carriage and Tell-Room, of which the following, taken in connect-ion with the accompanying drawings, is a specification.

My invention relates to elevator-doors, and has for its object the lessening of labor 011 the part of the attendant in opening and closing the same. I

It consists in applying mechanisms to the doors of an elevator Wellroom. and to the door of the carriage in such a manner that the door of the well-room at which the carriage is stopping and the carriage-door are simultaneously operated in opening and closmg.

I have shown one method of reducing my invention to practice in the accompanying drawings, in which- Figure 1 is an elevation showing a wellroom door in its closed position and a part of the well-room wall, the point of view being within the well-room. Fig. 2 is an elevation of the side of the carriage, showing the door of the same as seen from the landing outside the carriage, no well-room door or wall being shown; Fig. 3 is a horizontal section of the carriage and well-room, (the carriage being at a landing,) taken on a level with the lines x 00, Figs. 1 and 2, both the carriage-door and that of the Well-room being closed. Fig. 4 is a horizontal section similar to Fig. 3, with the exception that both the doors are open instead of closed. Fig. 5 is ahorizontal section of a portion of the carriage and well-room, enlarged, taken on the line 22, Figs. 1 and 2, and shows the construction of a detail. Fig. 6 is a horizontal section of a portion of the carriage and well-room, enlarged, taken on the line y y, Figs. 1 and 2, and shows the con struction of a detail. Fig. 7 is a vertical section, enlarged, of portions of the carriagedoor and of one of the well-room doors, and shows a detail.

A, Figs. 2, 3, 4, 5, and 6, indicates an elevator-carriage; B, Figs. 1, 3, and 4, the wellroom walls, and C the corner-posts of the wellroom.

, from being opened from. without.

D, Figs. 1, 3, 4, 5, G, and 7, indicates a door of the well-room, and E, Figs. 2, 3, 4, 5, (3, and 7, the door of the carriage. The carriagedoor. E is provided with an openly-wound helical spring F. (Shown in Figs 3 and 4 and by dotted lines in Fig. 2.) Part of this spring occupies a cylindrical channel in the body of the door, as shown at f, Fig. 2, and the remainder of its extends along the side of the carriage to the block F, which opposes its further extension at that end. A rod F is situated within the helical spring extending from the block F, to which it is fastened, to the point indicated by f in the channel just within the edge of the closed door, Figs. 2 and 3, and serves to keep that part of the spring which is without the channel from lateral buckling, the channel itself performing the same oflice for that part of the spring which is within it. spring F is to close the door E when unrestrained, which it does by the tension which the opening of the door places upon it by compressing it.

The well-room door D is provided with a spring G, Figs. 1, 3, and 4, in all respects similar to spring F, and which serves to close the door D when unrestrained.

H and H are two spring-cleats upon the well-room door D, between which a similar spring-cleat H on the carriage-door E passes in the ascent or descent of the carriage. (See Figs. 1, 2, 3, 4, and 6.) A side elevation of these spring-cleats enlarged is represented in Fig. 7, portion of the doors being shown. When the carriage stops at a landing, these cleats will stand relatively to each other, as shown in Figs. 6 and 7, and it is readily seen that if either door is moved laterally to open or shut it the other must move in unison with it. These cleats are made, preferably, in the shape of a flat spring, so as to yield readily to frontal but to resist lateral pressure, and each is bolted tightly at one end and held at the other by a bolt loosely set, the end of the cleat being slotted.

I, Figs. 1 and 5, is a latch in the well-room casing, adapted to engage the slot in the edge of the well-room door D to prevent the door The latch I swings upon the pin 1, upon the inner end of which is placed a curved arm 1 (see Figs.

The function of the,

1 and 5,) which engages with the block 1 ,10- cated on the carriage, (shown in Figs. 2 and 5, and whose location relative to the curved arm I is shown by the dotted lines in Fig. 1,) and thereby raises the latch when the elevator is at the landing, allowing the door to be opened. The latch I is kept down when not held up by the block I" by a small spring, (shown at I Fig. I.)

K is a catch pivoted at 75 on the floor of the carriage for the purpose of holding the doors open when desired, and is kept in position by the spring K.

L, Figs. 3 and 4, is a handle formovingthe door E.

The operation of my invention is as follows: If the well-room doors are not automatic, but are operated manually, then the carriagedoor E is moved by the hand of the attendant, and the well-room door D will, through the action of the cleats II, II, and H move in unison with it, (the carriage being at the land ing, and the latch I consequently released.) If the carriage starts up or down from a landing, the doors not having been closed, then the cleats on the two doors will slip out of engagement, and the well-room door I) will be closed by the spring .G and locked by the latch I. If the Well-room door is an automatic door moved by force derived from the movement of the car, as shown in my application dated March 3, 1889, Serial No. 304,521, subject, elevator well-room doors, or otherwise, then it will control the movement of the carriage-door, and the actuating mechanism will cause both the well-room and the carriage-doors to open and close instead of the well-room door only.

It the well-room dooris automatic, the cleat II may be dispensed with and the spring F be relied on to close the carriage-door; or the cleat II may be retained and the spring F omitted by making the spring G suiiieiently stiff to close both doors. hen the well-room door D is not automatic, but is moved by the attendant through the carriage-door E, then the cleat II may be omitted and the spring G depended upon to close the door D. If desired, the springs F and G may both be omitted and the door E operated wholly by hand, the door D moving in unison with it when the carriage is ata landing by means of the cleats II I1 H The gist of my invention consists in cansing a well-room door to operate a carriagedoor, or vice versa, by means of engaging cleats or equivalent mechanisms.

I claim as my invention- 1. In an elevator, the carriage A, its door E, the well-room door D, the spring G, and cleats II II 11*, substantially as and for the purpose set forth.

2. In an elevator, the carriage A, its door E, the well-room door D, the spring F, the spring G, and the cleats II, II, and IP, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 29th day of April, A. I). 1889.

\VILLIAM E. NICKERSON.

Witnesses:

FRANK G. PARKER, MATTHEW M. BLUNT. 

